Ventilator.



W. A. BARTHOLOMEW..

VENTILATOR.

' r y 4APPLICATION FILED APR.22.191B. r 1,299,286. l Patented Apr. 1,1919.

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UNITED STATES PATENT FFIQE.

WARD A. BARTHOLOMEW, OF BUFFALO, NEW YORK.

VENTILATOR.

` -Application filed April 22, 1918.

To @ZZ Lo/Lovin, t 'may concern.'

Be it known that I, TARD A. BAR'rHoLo- Mnw, a citizen `of the United States, residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Ventilators; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to ventilators and has for its object to generally improve the construction and operation of such devices so as to economize in their construction and to simplify the same, while at the same time rendering their operation more sure and re liable and avoiding excessive wear and the consequent necessity of frequent renewal of parts.

With these objects in view, the invention consists in the improved construction, arrangement and combination of parts hereinafter fully described and afterward specific cally claimed.

In order that-the construction and operation thereof may be readily comprehended,

vI have illustrated in the accompanying drawing an approved embodiment of my invention and will now proceed to specifically describe the same in connection with said drawing, in which my ventilator is illustrated in vertical section, mounted upon the upper or discharge end of a ventilating pipe adapted to be secured in any approved mannerupon a building, apartment, room, or hollow structure to be ventilated.

Referring specifically to the drawing, l indicates the vent pipe through which a building, room .or apartment is to be ventilated, said pipe being of any suitable material and usually cylindrical, securely fastened in the roof or top of the structure to be ventilated and open at bottom and top. y

In this pipe, by means of suitable rivets or bolts 2, are secured two or more horizontal brackets 3 and 4, having suitable central openings, in which are secured the lower members 5 and 6, of ball bearings by means of bolts or rivets 7 and 8, or other suitable fastenings, said ball bearings, having upper members 9 and 10, resting on balls carried by the lower members. The upper and lower members are provided with alined, central, vertical openings to receive a vertical shaft 11, which is secured to the upper members of Specification of Letters Patent.

Patented Apr. 1, 1919.

Serial- No. 229,977. i

the bearings by suitable means, such as set screws 12 and 13, so that said shaft may rotate in the lower members and with the upper members of the bearings. A tight collar 112L will be put on the lower end of the vertical shaft 11 and secured by a set screw to prevent the shaft from lifting out of the bearings 5 and 6.

The ventilator comprises a hood 14, of frusto-conical form, increasing in diameter to the discharge end, from which hood de pends approximately centrally, a branch pipe or neck l5, which is adapted to have its open lower end 16 passed over the upper end` 17 of the vent^pipe l, said neck havingV secured inside of it, two or more horizontal brackets 18 and 19, with central openings to receive sleeves 2O and 21, secured by suitable means, such as bolts or rivets 22.

VThe vertical shaft 11 is rigidly secured in the sleeves 20 and 21, by suitable means, such as set screws 23, and as it is secured rigidly, as before stated, to the upper members of the ball bearings in the vent pipe, it will permit the neck 15, and with it the hood, etc., to be rotated upon the vent pipe 1.

In the smaller end of the hood 14 is secured a transverse bracket 24, while in the discharge or larger end is a similar bracket 25, which brackets, in central openings therein, support the stationary members 26 of ball bearings by means of rivets or bolts 27.

A horizontal shaft 28 passes through these members and through a conical cap 29 which closes the/smaller end of the hood, the movable members 30 of the ball bearings being threaded on the shaft on oppositel sides of the stationary members, and secured by nuts 81.

On one projecting outer end of the shaft 28 is secured a drive fan 32 and on the opposite end a suction fan 33, the blades of the fan 32 being flat and those of the fan 33, cup-shaped, for purposes described hereinafter, each fan being surrounded and protected by a cylindrical jacket, that of the fan 32 being marked 34- and that of the fan 33, marked 35, the jacket 34 being larger than the smaller end of the hood to which it is attached, is held by braces 36, extending from the hood, while the jacket 35 is of the same diameter as, and is directly secured to the larger or suction end of the hood.

The ventilator being supported on the vertical pivotal shaft 1l, and free to revolve thereon, is governed in such rotation by means of a vane 37 mounted on the jacket 35 and stiifened by braces 38 secured at their outer ends to the vane and at their inner ends to the outer edge of the jacket.

With the construction of device as hereinbefore described, the wind striking the drive fan 32 will rotate it and the shaft 28, carrying also the fan 33 which is cup shaped in order to create a suction through the hood from left to right. The air which drives the fan 32 will pass outward over the cap 29 and outside of the hood 14, and jacket 35, thus causing a vacuum at the discharge end of the hood. rllhe rotation of the fan 33 will create a current, by suction, through the pipe l, neck 15 and hood la, thus drawing out the air from. the structure upon which the vent pipe 1 is mounted and thoroughly Ventilating it. Should it be desired to use this ventilator to force air into the chamber or structure upon which the vent pipe 1 is mounted a left hand suction fan 33 would be used, whereas a right hand suction fan 33 -would be used for ventilation purposes only.

To make a left hand fan the cup shaped wings would be formed wrong side out, or the opposite way to a right hand fan. Rotation of the shaft 28 and fan 33 by the drive fan 32, as before described, will now draw in the air through the. hood 14, its neck 15 and the vent pipe 1, into the chamber to which the latter is attached.

It will be observed that the suction fan is somewhat larger, in this instance about one third larger, in diameter than the vent pipe. This will cause an increased circulation through the vent pipe 1 and consequently more rapid suction.

The angle of the veins of the draft fan 32 may be altered in their inclination which will vary the speed of its rotation and consequently the amount of ventilation.

The cup shaped wings of the suction fan 33 may also be adjusted as desired.

By incasing the fans in the jackets or collars 34- and 35, the lateral spread of the air in either instance is provided and the fans themselves are protected against rain or snow whereby their operation might be affected.

The body of the hood is made tapering so that the travel-of the air through the pipe 1 and neck 15 and hood 14 will not be at any abrupt angles as might be the case if the hood was of an even diameter from end to end.

The construction shown and described,l

permits the fans to be made of light Inaterial while at the same time giving them full strength and stiffness.

No gears are necessary, as have been heretofore used, in the construction of this device. As a consequence its operation will make no noise and the wearing of gears and consequent necessity of replacement is avoided. No balance weights are necessary as have been in some former constructions.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

1. A ventilator comprising a frusto-coni cal hood having its smaller end closed and its larger end open, a shaft mounted longitudinally and rotatively in and through said hood, a drive fan secured to theshaft outside of the hood adjacent said smaller end, a suction fan secured to the shaft within said larger hood end, a neck depending from the lower side of the hood having pivotal supporting connection with the structure to be ventilated, and a wind directing vane mounted upon said hood.

2. The herein described ventilator comprisinv a tapering hood a conical cap closing the smaller end thereof, a cylindrical jacket secured to the hood near its smaller end and projecting beyond said end, a second cylindrical cap secured to the larger end of the hood, a vertical pivot on which the structure is mounted, a suitable vane attached to the hood, a drive fan mounted on the end of the shaft outside of the closure and within the cylindrical jacket, and a suction fan mounted on the opposite end of the shaft wit-hin the other cylindrical jacket.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WARD A. BARTHOLOMEW.

Witnesses:

JULIA l.. BARTHOLOMEW, JAMES R. DIAMOND.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

